MESON Chess Problem Database

Problem Display
PID: 152959 (8/1B4B1/8/2kP4/K4P2/8/8/7Q w - - 0 1)

Petrasinovic, Petrasin

Schweizerische Schachzeitung, 2001

8/1B4B1/8/2kP4/K4P2/8/8/7Q

#2

6 + 1

5454 Near Snap 2021
3713 Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qb4#
      • 1...Kc4
        • 2.Qc2#
        • 2.Qb5#
      • 1...Kd6!
    • 1.Qg1+?
      • 1...Kc4
        • 2.Qd4#
      • 1...Kd6!
    • 1.d6?
      • threat
        • 2.Qc6#
      • 1...Kc4
        • 2.Qd5#
      • 1...Kb6
        • 2.Bd4#
      • 1...Kxd6!
  • Keys
    • 1.Qh7!
      • 1...Kc4
        • 2.Qc2#
      • 1...Kb6
        • 2.Bd4#
      • 1...Kd6
        • 2.Bf8#

Anticipated by 214711(1877), 222395(1883), 41899(1902)

This anticipates 269223(2002)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::B(F)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::B(F)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).